Alert archive / Mississippi / Excessive Heat Warnings in 2011
Excessive Heat Warning 4, NWS Jackson, MS
NWS Jackson, MS issued this excessive heat warning at Aug 7, 2011, 4:05 AM CDT for 13 counties in Mississippi; 4 parishes in Louisiana; Ashley County, Chicot County, Arkansas. It was in force for 15 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 7, 2011, 4:05 AM CDT (09:05 UTC)
- Expired
- Aug 7, 2011, 7:00 PM CDT
- In force
- 15 hr
- Issued by
- NWS Jackson, MS
Counties Ashley County, AR, Chicot County, AR, East Carroll Parish, LA, Morehouse Parish, LA, Richland Parish, LA, West Carroll Parish, LA, Bolivar County, MS, Carroll County, MS, Grenada County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Leflore County, MS, Montgomery County, MS, Sharkey County, MS, Sunflower County, MS, Washington County, MS, Webster County, MS, Yazoo County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 121 km from the middle of the area, began a volume at 09:03 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Jackson, MS (KJAN), launched 00:00Z, 9.1 hours before the alert went out and 112 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 3495 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 1152 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -21 m²/s²
- 0-3 km storm-relative helicity
- 10 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this excessive heat warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Jackson, MS wrote its last area forecast discussion before this excessive heat warning went out at Aug 6, 9:02 PM CDT, 7 hours 3 minutes earlier.
Area forecast discussion, Aug 6, 9:02 PM CDT, 7 hours 3 minutes before
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</html>Hazardous weather outlook, Aug 6, 2:03 PM CDT, 14 hours 2 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE JACKSON MS 203 PM CDT SAT AUG 6 2011 ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>027-034>036- 040>042-047-053-059-060-071915- ASHLEY-CHICOT-MOREHOUSE-WEST CARROLL-EAST CARROLL-RICHLAND- MADISON LA-FRANKLIN LA-CATAHOULA-TENSAS-CONCORDIA-BOLIVAR- SUNFLOWER-LEFLORE-GRENADA-CARROLL-WASHINGTON-HUMPHREYS-HOLMES- ISSAQUENA-SHARKEY-YAZOO-WARREN-CLAIBORNE-JEFFERSON-ADAMS- 203 PM CDT SAT AUG 6 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST LOUISIANA...SOUTHEAST ARKANSAS AND WESTERN PORTIONS OF MISSISSIPPI. .DAY ONE...TONIGHT AND SUNDAY HOT AND HUMID CONDITIONS WILL PERSIST AND AFTERNOON HEAT INDICES WILL RANGE FROM 105 TO 110 DEGREES ONCE AGAIN. A HEAT ADVISORY REMAINS IN EFFECT THROUGH MONDAY. .DAYS TWO THROUGH SEVEN...SUNDAY NIGHT THROUGH FRIDAY HEAT ADVISORIES WILL LIKELY BE NEEDED FURTHER INTO THE WORK WEEK. OTHERWISE...AN ACTIVE PERIOD OF THUNDERSTORMS IS POSSIBLE STARTING MONDAY AFTERNOON THROUGH AT LEAST EARLY THURSDAY...DUE TO A DEVELOPING NORTHWEST FLOW PATTERN. THE PRIMARY THREAT WITH THESE STORMS WILL BE THE POSSIBILITY OF DAMAGING WIND GUSTS. TIMING INDIVIDUAL EVENTS WILL BE DIFFICULT...WITH DETAILS BECOMING A BIT CLEARER EACH PASSING DAY. THE HIGHEST CHANCES FOR EXPERIENCING STORMS DURING THIS PERIOD WILL BE ALONG AND NORTH OF A LINE EXTENDING FROM CROSSETT ARKANSAS...TO YAZOO CITY...TO MERIDIAN MISSISSIPPI. .SPOTTER CALL TO ACTION STATEMENT... THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND EMERGENCY MANAGEMENT PERSONNEL IN SUPPORT OF SEVERE WEATHER OPERATIONS...IS NOT EXPECTED THROUGH FRIDAY. MSZ028>033-037>039-043>046-048>052-054>058-061>066-072>074-071915- MONTGOMERY-WEBSTER-CLAY-LOWNDES-CHOCTAW-OKTIBBEHA-ATTALA-WINSTON- NOXUBEE-MADISON MS-LEAKE-NESHOBA-KEMPER-HINDS-RANKIN-SCOTT-NEWTON- LAUDERDALE-COPIAH-SIMPSON-SMITH-JASPER-CLARKE-FRANKLIN MS-LINCOLN- LAWRENCE-JEFFERSON DAVIS-COVINGTON-JONES-MARION-LAMAR-FORREST- 203 PM CDT SAT AUG 6 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND EASTERN MISSISSIPPI. .DAY ONE...TONIGHT AND SUNDAY HOT AND HUMID CONDITIONS WILL PERSIST AND AFTERNOON HEAT INDICES WILL RANGE UP TO ABOUT 105 DEGREES ONCE AGAIN. A HEAT ADVISORY REMAINS IN EFFECT THROUGH SUNDAY NIGHT. .DAYS TWO THROUGH SEVEN...SUNDAY NIGHT THROUGH FRIDAY AN ACTIVE PERIOD OF THUNDERSTORMS IS POSSIBLE STARTING MONDAY AFTERNOON THROUGH AT LEAST EARLY THURSDAY...DUE TO A DEVELOPING NORTHWEST FLOW PATTERN. THE PRIMARY THREAT WITH THESE STORMS WILL BE THE POSSIBILITY OF DAMAGING WIND GUSTS. TIMING INDIVIDUAL EVENTS WILL BE DIFFICULT... WITH DETAILS BECOMING A BIT CLEARER EACH PASSING DAY. THE HIGHEST CHANCES FOR EXPERIENCING STORMS DURING THIS PERIOD WILL BE ALONG AND NORTH OF A LINE EXTENDING FROM CROSSETT ARKANSAS...TO YAZOO CITY...TO MERIDIAN MISSISSIPPI. OTHERWISE...COMBINATIONS OF HEAT AND HUMIDITY MAY CONTINUE TO BE IN THE RANGE OF HEAT ADVISORY CRITERIA AT TIMES DURING THE WEEK...ESPECIALLY SOUTH PORTIONS. .SPOTTER CALL TO ACTION STATEMENT... THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND EMERGENCY MANAGEMENT PERSONNEL IN SUPPORT OF SEVERE WEATHER OPERATIONS...IS NOT EXPECTED THROUGH FRIDAY. FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT WWW.SRH.NOAA.GOV/JAN. 40
The office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 7:19 PM CDT | Severe Thunderstorm Warning | JAN | Hinds | 26 min |
| Aug 7, 4:05 AM CDT | Heat Advisory | JAN | Bolivar, Carroll, Grenada, Holmes, Humphreys, Issaquena and 7 more | 4 days |
| Aug 7, 3:43 PM CDT | Special Weather Statement | JAN | Hinds | 32 min |
| Aug 7, 5:30 PM CDT | Special Weather Statement | JAN | Chicot | 10 min |
| Aug 7, 5:41 PM CDT | Special Weather Statement | JAN | Ashley | 14 min |
| Aug 7, 6:03 PM CDT | Severe Thunderstorm Warning | JAN | Ashley | 42 min |
| Aug 7, 6:48 PM CDT | Special Weather Statement | JAN | Ashley | 17 min |
Nearby
Excessive Heat Warnings in Mississippi, 2011Excessive Heat Warnings in Louisiana, 2011Excessive Heat Warnings in Arkansas, 2011Every excessive heat warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.